Crossword Genius

Pirate show (5)

Ross

I believe the answer is:

teach

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This clue might be a double definition.

'pirate' is the first definition.
Although both the answer and definition are verbs in their base form, I don't understand how one could define the other.

'show' is the second definition.
(I've seen this before)

Can you help me to learn more?

(Other definitions for teach that I've seen before include "show" , "Tutor" , "train" , "Provide learning to" , "Blackbeard" .)

I've seen this clue in The Telegraph.
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